Allow passing model JSON directly

[bradleyjkemp]

Currently this library only supports passing a model filename which is internally read and parsed by parseModel

xgbshap/parse.go

Line 104 in 08d02fc

func parseModel(

It'd be useful to pass in the contents of this file (e.g. which has been //go:embed'ed), and not require reading from the filesystem

Would you accept a PR which added a NewPredictorJSON (or similarly named) function?

[horgh]

Hi! Yes, that sounds like a good idea.